Oilpan: move RenderObjects off heap.

Source/core/layout/LayoutTableCol.cpp

 /*
  * Copyright (C) 1997 Martin Jones (mjones@kde.org)
  *           (C) 1997 Torben Weis (weis@kde.org)
  *           (C) 1998 Waldo Bastian (bastian@kde.org)
  *           (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 26 matching lines @@
 
 LayoutTableCol::LayoutTableCol(Element* element)
     : RenderBox(element)
     , m_span(1)
 {
     // init RenderObject attributes
     setInline(true); // our object is not Inline
     updateFromElement();
 }
 
-void LayoutTableCol::trace(Visitor* visitor)
-{
-    visitor->trace(m_children);
-    RenderBox::trace(visitor);
-}
-
 void LayoutTableCol::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
 {
     RenderBox::styleDidChange(diff, oldStyle);
 
     // If border was changed, notify table.
     if (parent()) {
         LayoutTable* table = this->table();
         if (table && !table->selfNeedsLayout() && !table->normalChildNeedsLayout() && oldStyle && oldStyle->border() != style()->border()) {
             table->invalidateCollapsedBorders();
         } else if (oldStyle && oldStyle->logicalWidth() != style()->logicalWidth()) {
@@ skipping 132 matching lines @@
     return style()->borderStart();
 }
 
 const BorderValue& LayoutTableCol::borderAdjoiningCellAfter(const LayoutTableCell* cell) const
 {
     ASSERT_UNUSED(cell, table()->colElement(cell->col() - 1) == this);
     return style()->borderEnd();
 }
 
 }